Chirping noise

So....I cleaned up my PC from dust ...opened the case, disconnected the cables from the outside and closed everything back in . PC is running great , no problems . ....but now , there is an annoying chirping sound that just won't go away ! If i turn up my speakers manually I hear the chirping...

I've attached a short video to demonstrate the sound I'm hearing View: https://imgur.com/a/UMNWBTM This is a closer video View: https://imgur.com/a/IvNEr1m it shows the fan somewhat slowing when the noise occurs Fairly certain at this point the noise is coming from the PSU. The noise only...

I give up , i dont know what to do anymore . For a very long time I have been hearing an annoying chirping sound from the back of my pc case where the motherboard connections are . i even hear it from the speakers , however that is more strange - If I move the manual "wheel " on the right...